qemu/hw/milkymist.c
Avik Sil e4ada29e90 Make default boot order machine specific
This patch makes default boot order machine specific instead of
set globally. The default boot order can be set per machine in
QEMUMachine boot_order. This also allows a machine to receive a
NULL boot order when -boot isn't used and take an appropriate action
accordingly. This helps machine boots from the devices as set in
guest's non-volatile memory location in case no boot order is
provided by the user.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-15 18:26:18 -06:00

219 lines
6.7 KiB
C

/*
* QEMU model for the Milkymist board.
*
* Copyright (c) 2010 Michael Walle <michael@walle.cc>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "sysbus.h"
#include "hw.h"
#include "flash.h"
#include "sysemu/sysemu.h"
#include "devices.h"
#include "boards.h"
#include "loader.h"
#include "elf.h"
#include "sysemu/blockdev.h"
#include "milkymist-hw.h"
#include "lm32.h"
#include "exec/address-spaces.h"
#define BIOS_FILENAME "mmone-bios.bin"
#define BIOS_OFFSET 0x00860000
#define BIOS_SIZE (512*1024)
#define KERNEL_LOAD_ADDR 0x40000000
typedef struct {
LM32CPU *cpu;
hwaddr bootstrap_pc;
hwaddr flash_base;
hwaddr initrd_base;
size_t initrd_size;
hwaddr cmdline_base;
} ResetInfo;
static void cpu_irq_handler(void *opaque, int irq, int level)
{
CPULM32State *env = opaque;
if (level) {
cpu_interrupt(env, CPU_INTERRUPT_HARD);
} else {
cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
}
}
static void main_cpu_reset(void *opaque)
{
ResetInfo *reset_info = opaque;
CPULM32State *env = &reset_info->cpu->env;
cpu_reset(CPU(reset_info->cpu));
/* init defaults */
env->pc = reset_info->bootstrap_pc;
env->regs[R_R1] = reset_info->cmdline_base;
env->regs[R_R2] = reset_info->initrd_base;
env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
env->eba = reset_info->flash_base;
env->deba = reset_info->flash_base;
}
static void
milkymist_init(QEMUMachineInitArgs *args)
{
const char *cpu_model = args->cpu_model;
const char *kernel_filename = args->kernel_filename;
const char *kernel_cmdline = args->kernel_cmdline;
const char *initrd_filename = args->initrd_filename;
LM32CPU *cpu;
CPULM32State *env;
int kernel_size;
DriveInfo *dinfo;
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *phys_sdram = g_new(MemoryRegion, 1);
qemu_irq irq[32], *cpu_irq;
int i;
char *bios_filename;
ResetInfo *reset_info;
/* memory map */
hwaddr flash_base = 0x00000000;
size_t flash_sector_size = 128 * 1024;
size_t flash_size = 32 * 1024 * 1024;
hwaddr sdram_base = 0x40000000;
size_t sdram_size = 128 * 1024 * 1024;
hwaddr initrd_base = sdram_base + 0x1002000;
hwaddr cmdline_base = sdram_base + 0x1000000;
size_t initrd_max = sdram_size - 0x1002000;
reset_info = g_malloc0(sizeof(ResetInfo));
if (cpu_model == NULL) {
cpu_model = "lm32-full";
}
cpu = cpu_lm32_init(cpu_model);
env = &cpu->env;
reset_info->cpu = cpu;
cpu_lm32_set_phys_msb_ignore(env, 1);
memory_region_init_ram(phys_sdram, "milkymist.sdram", sdram_size);
vmstate_register_ram_global(phys_sdram);
memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram);
dinfo = drive_get(IF_PFLASH, 0, 0);
/* Numonyx JS28F256J3F105 */
pflash_cfi01_register(flash_base, NULL, "milkymist.flash", flash_size,
dinfo ? dinfo->bdrv : NULL, flash_sector_size,
flash_size / flash_sector_size, 2,
0x00, 0x89, 0x00, 0x1d, 1);
/* create irq lines */
cpu_irq = qemu_allocate_irqs(cpu_irq_handler, env, 1);
env->pic_state = lm32_pic_init(*cpu_irq);
for (i = 0; i < 32; i++) {
irq[i] = qdev_get_gpio_in(env->pic_state, i);
}
/* load bios rom */
if (bios_name == NULL) {
bios_name = BIOS_FILENAME;
}
bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
if (bios_filename) {
load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
}
reset_info->bootstrap_pc = BIOS_OFFSET;
/* if no kernel is given no valid bios rom is a fatal error */
if (!kernel_filename && !dinfo && !bios_filename) {
fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
bios_name);
exit(1);
}
milkymist_uart_create(0x60000000, irq[0]);
milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3],
80000000, 0x10014d31, 0x0000041f, 0x00000001);
milkymist_hpdmc_create(0x60002000);
milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
milkymist_memcard_create(0x60004000);
milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]);
milkymist_pfpu_create(0x60006000, irq[8]);
milkymist_tmu2_create(0x60007000, irq[9]);
milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]);
milkymist_softusb_create(0x6000f000, irq[15],
0x20000000, 0x1000, 0x20020000, 0x2000);
/* make sure juart isn't the first chardev */
env->juart_state = lm32_juart_init();
if (kernel_filename) {
uint64_t entry;
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
1, ELF_MACHINE, 0);
reset_info->bootstrap_pc = entry;
if (kernel_size < 0) {
kernel_size = load_image_targphys(kernel_filename, sdram_base,
sdram_size);
reset_info->bootstrap_pc = sdram_base;
}
if (kernel_size < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
kernel_filename);
exit(1);
}
}
if (kernel_cmdline && strlen(kernel_cmdline)) {
pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
kernel_cmdline);
reset_info->cmdline_base = (uint32_t)cmdline_base;
}
if (initrd_filename) {
size_t initrd_size;
initrd_size = load_image_targphys(initrd_filename, initrd_base,
initrd_max);
reset_info->initrd_base = (uint32_t)initrd_base;
reset_info->initrd_size = (uint32_t)initrd_size;
}
qemu_register_reset(main_cpu_reset, reset_info);
}
static QEMUMachine milkymist_machine = {
.name = "milkymist",
.desc = "Milkymist One",
.init = milkymist_init,
.is_default = 0,
DEFAULT_MACHINE_OPTIONS,
};
static void milkymist_machine_init(void)
{
qemu_register_machine(&milkymist_machine);
}
machine_init(milkymist_machine_init);